On days that are meant for nothing but travel, I will usually put in at least 12 hours on the road, with a couple hours worth of breaks, often doing 1,000 km a day. i too have to do all the driving with the trailer behind, but neither bothers me. I know a bunch of people that have driven from the Maritimes to Calgary 5 days, not lots of sightseeing though.
This trip is something we plan for when I retire, or semi-retire. I really hope to take at least a month travel each way. See lots of those great sites along the way.